目的
单击时关闭锚标记的父div.在下面的代码中,我想在用户单击锚标记close_performance_tt时隐藏div performance_tt.
问题
花了几个小时后,无法让它在iOS设备上运行.在其他一切工作正常,甚至是BlackBerry 10设备.
<div id="performance_tt" style="display: none;width: 300px;height: 200;overflow: auto;padding: 5px;background-color: yellow;">
<div>Website performance has become an important consideration for most sites.
The speed of a website affects usage and user satisfaction, as well as search engine rankings, a factor that directly correlates to revenue and retention.
As a result, creating a system that is optimized for fast responses and low latency is key.</div>
<a id="close_performance_tt" href="#">Close</a>
<script>
var userAgent = navigator.userAgent.toLowerCase();
var isiOS …我试图将R data.frame写入Netezza表。它有大约5.5万行，并且我将4GB设置为Java的内存限制（选项（java.parameters =“ -Xmx4096m”））
查询：
insert into MY_TABLE_NAME select * from external 'csv_file_containing_data_frame.csv' using (delim ',' remotesource 'jdbc');
当我从诸如DbVisualizer之类的工具运行SQL时，上面的SQL 可以正常工作，但是当我尝试从RStudio运行它时出现以下错误。
R代码：
driver <- JDBC(driverClass="org.netezza.Driver", classPath = "drivers//nzjdbc.jar", "'")
connWrite <- dbConnect(driver, "jdbc:netezza://DB_SERVER:1234//DB_NAME", username, password)
str_insert_query <- paste(
"insert into MY_TABLE select * from external '", OutputFile , "' using (delim ',' remotesource 'jdbc');", sep = ""
dbSendQuery(connWrite, str_insert_query[1])
dbDisconnect(connWrite)
错误信息：
Error in .verify.JDBC.result(r, "Unable to retrieve JDBC result set for ", :
Unable to retrieve JDBC result set for …我在Laravel 5.1应用程序中有一组删除语句,我已将其放入事务中.
我有我的代码如下,并试图返回到同一页面.但我得到一个空白页面.我的routes.php很好.
DB::transaction(function () use ($foo, $bar, $request)
{
// Delete from table abc
$deletedFoo = DB::delete('delete from abc where id = ' . $foo);
// Delete from table xyz
$deletedBar = DB::delete('delete from xyz where id = ' . $bar);
// Shows blank page
$request->session()->flash('changes_saved', 'Success! All your changes were saved.');
return back();
});
但是,如果我将返回starement放在DB :: transaction块之外,它可以正常工作.
DB::transaction(function () use ($foo, $bar)
{
// Delete from table abc
$deletedFoo = DB::delete('delete from abc where id = …我有一个非常简单的例子,我用它来学习C#中的结构:
struct ScreenPosition
{
// These are the two private members of the structure
private int x;
private int y;
private int RangeCheckedX(int xPos)
{
if (xPos < 0 || xPos > 1280)
{
throw new ArgumentOutOfRangeException("X");
}
return xPos;
}
private int RangeCheckedY(int yPos)
{
if (yPos < 0 || yPos > 1024)
{
throw new ArgumentOutOfRangeException("Y");
}
return yPos;
}
// Declaring the non-default constructor
public ScreenPosition(int X, int Y)
{
this.x = RangeCheckedX(X); // ERROR HERE
this.y …